CVE-2025-69196: falha de alta gravidade em jlowin fastmcp
FastMCP OAuth Proxy token reuse across MCP servers
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.4epss 0.4%
FastMCP is the standard framework for building MCP applications. Prior to version 2.14.2, the server does not properly respect the resource parameter submitted by the client in the authorization and token request. Instead of issuing the token explicitly for the MCP server, the token is issued for the base_url passed to the OAuthProxy during initialization. This issue has been patched 2.14.2.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Produtos afetados
jlowin · fastmcpCVEs relacionadas — jlowin fastmcp
No mesmo produto, das mais perigosas para as menos.
CVE-2025-64340MEDIUMFastMCP has a Command Injection vulnerability - Gemini CLIEPSS 0.7%CVE-2025-62800MEDIUMFastMCP vulnerable to reflected XSS in client's callback pageEPSS 0.3%CVE-2025-62801MEDIUMFastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_nameEPSS 0.2%CVE-2026-27124HIGHFastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy VulnerabilitiesEPSS 0.2%
Referências
https://access.redhat.com/errata/RHSA-2026:36350https://access.redhat.com/security/cve/CVE-2025-69196https://bugzilla.redhat.com/show_bug.cgi?id=2448179https://github.com/PrefectHQ/fastmcp/security/advisories/GHSA-5h2m-4q8j-pqpjhttps://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-69196.json